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Research Papers

Experimental and Model Based Performance Analysis of a Linear Parabolic Trough Solar Collector in a High Temperature Solar Cooling and Heating System

[+] Author and Article Information
Ming Qu

 School of Civil Engineering, 550 Stadium Mall Drive, West Lafayette, IN 47906-2051mqu@purdue.edu

Hongxi Yin

School of Engineering Education, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907hyin@purdue.edu

David H. Archer

Department of Mechanical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213archerdh@andrew.cmu.edu

J. Sol. Energy Eng 132(2), 021004 (May 03, 2010) (12 pages) doi:10.1115/1.4001406 History: Received December 29, 2008; Revised February 01, 2010; Published May 03, 2010; Online May 03, 2010

An innovative solar cooling and heating system has been designed, installed, tested, and modeled at Carnegie Mellon University to assess the technical and economic feasibility of high temperature solar cooling and heating system. This system primarily consists of parabolic trough solar collectors (PTSC) and a double effect absorption chiller. A comprehensive model for the tubular receiver of the PTSC has been developed to improve the PTSC design and overall system performance. The model has been verified by the experimental data from the tests on the PTSC in this system. The experimental data and theoretical analysis demonstrated that the properties of the glass envelope of PTSC significantly impacted the PTSC’s performance. The model calculations indicated that the vacuum in the annular space between the glass tube and absorber pipe of the PTSC does not markedly improve its efficiency. In addition, the system performance of the high temperature solar cooling and heating system has been presented and evaluated by using experimental data. Based on these model calculations, the performance of the PTSC installed has been projected and measures to improve the PTSC design have been recommended.

Copyright © 2010 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Process and instrumentation diagram of the solar absorption cooling and heating system

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Figure 2

PTSC installed in CMU

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Figure 3

Energy flow in receiver tube

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Figure 4

Connections between receiver tubes

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Figure 5

Thermal network of the receiver tube

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Figure 6

PTSC performance test by using absorption chiller

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Figure 7

PTSC performance test by using heat exchanger

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Figure 8

Temperature and its distribution of the glass envelope

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Figure 9

Comparison between the measured and calculated PTSC efficiencies

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Figure 10

Radial temperature distributions in the receiver pipe

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Figure 11

Thermal losses through the PTSC

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Figure 12

PTSC’s efficiency and direct normal solar radiation at 0 incident angle

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Figure 13

PTSC’s efficiency and incident angle

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Figure 14

PTSC’s efficiency and wind speed

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Figure 15

PTSC’s efficiency and air in the annual space

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Figure 16

PTSC’s efficiency and glass cover

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Figure 17

Operating temperatures of solar cooling test on July 31, 2007

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Figure 18

Cooling capacity of solar cooling system on July 31, 2007

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